Duplantis finished with a best vault of 6.10m. Ernest John Obieno of the Philippines took silver with 6.00m, while Australian Kurtis Marschall and American Chris Nilsen shared bronze with 5.95m.
Remarkably it was a sixth successive title for the 23-year-old US-born Swede; he was the European, world outdoor, and world indoor champion in 2022, and Olympic and European indoor winner in 2021.
“I’m really happy about all these consecutive golds. I don’t know where this one ranks but I’m happy to keep winning,” said Duplantis.
“This was maybe the craziest atmosphere I’ve ever competed in so it meant a lot to be able to turn on a pole vault show for them.”
“I felt a bit of pressure as defending champion but I’m glad to come through it. It feels pretty good to be on top again.”
Duplantis sailed clear of the opening mark of 5.55m, skipped 5.75m, and went over with a lot to spare at 5.85m.
Only four other vaulters from the 12-strong field went clear at 5.85m: France’s Thibaut Collet (for a personal best), Marschall, Obiena, and Nilsen, the latter on the third time of asking.
Obiena, Collet, and Nilsen then cleared 5.90m as Duplantis opted not to compete at that height.
Marschall failed once at that height but skipped straight successfully to a personal best of 5.95m. Collet mirrored the Australian’s strategy as the bar was raised to the mythical 6.00m mark.
Duplantis flew over that height easily, as did Obiena on his second effort for what was an Asian record.
But it proved more problematic for the remaining vaulters, Collet first out to maintain France’s medal-less championships, swiftly followed by Marschall and Nilsen.
The bar was raised to 6.05m, posing no problem for Duplantis. Obiena, however, failed with his first attempt and opted to have the bar go up to 6.10m.
The US-born Swede Duplantis made no mistake, showing real emotion on the landing for the first time in realisation that gold was likely his.
That became a reality after Obiena failed in his bid at that height.
The question left was whether Duplantis would try to better his own world record of 6.22m, set indoors in France in February.
He went close on his three bids but was still assured of a second-world gold.
“I try not to set limits and barriers on myself and once I started to realise a world record was possible I tried not to see it as a record but just as another height I can achieve,” Duplantis said.
“But today never really felt like a world record competition. It was more a pure competition and that’s how it can be. It was great fun. I’d spent a lot of energy by the time it got up to 6.23m.”